Headlight Problem

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05 Oct 2013 21:00 #16032 by GlennS
Headlight Problem was created by GlennS
A couple of weeks ago I was pulling out of a parking lot, it was dusk and when I turned the headlights on they only came up half way. They stayed that way for a a couple of miles and then can the rest of the way up.

Tonight I thought about that and tested the headlights in the garage. I turned them on and off a couple of times. On the third time the headlights did not come up but they turned on. I tried a couple more times with the same result. The headlights will lite but do not rise.

I am looking for suggestions as to what the cause of the problem might be.

Thanks,

Glenn

Glenn Simpson

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06 Oct 2013 20:24 #16037 by mm928
Replied by mm928 on topic Headlight Problem
Sorry Glenn, those things to be pretty robust. You know how to bring them up manually right? I am sure someone knows and will post soon.

I have had one not go all the way down, but that turned out to be a piece of something else getting in the way that I did not secure.

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07 Oct 2013 18:47 #16056 by GlennS
Replied by GlennS on topic Headlight Problem
Thanks Mike, yes I do know how to operate them manually. I am hoping it is a relay or something like that. I expect that one of our peers have some experience with the circuit.

Glenn Simpson

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07 Oct 2013 21:40 #16060 by 928mac
Replied by 928mac on topic Headlight Problem
Make sure the mechanism is clear and not falling off or it may punch a hole in the rad.
Do you have a set of manuals?

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08 Oct 2013 19:29 #16066 by GlennS
Replied by GlennS on topic Headlight Problem
I have the manuals on CD. Is there guidance in the manual on the headlights?

Glenn Simpson

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08 Oct 2013 21:56 #16068 by 928mac
Replied by 928mac on topic Headlight Problem
I found this info

license-plate lights are the Same fuse: #10, 5 amp.

Also check for 12 volts (with lights turned on) on the red/yellow wire at the potentiometer (adjusting knob). The brown/red wire is ground, check for zero ohms to a clean chassis point. The voltage on the green/yellow will vary with the knob setting, this is what tells the motors what position to move to.

and this link
forums.rennlist.com/rennforums/10801017-post1.html

and this one
forums.rennlist.com/rennforums/928-forum...?highlight=headlight

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10 Oct 2013 19:16 #16079 by GlennS
Replied by GlennS on topic Headlight Problem
Ok folks,

Here’s a head scratcher for you… after reading as much as I could find on my headlight problem I went out to the car and started doing a visual inspection of the headlight mechanism and found nothing unusual. I decided to take the boot off the headlight manual operating mechanism and manually raise the headlights to see how they would respond when I operated the switch. I was surprised when I turned the ignition key to on; the headlights immediately lowered. I turned the lights on with the switch and they operated perfectly.

This kind of outcome is a little unsettling to me; it makes me wonder if this problem will resurface intermittently (if it does of course it will happen at the most inopportune time). I operated the headlights a few times and they responded perfectly. I hope it was a case of dirty contacts or something of that nature and everything will be fine. Naturally, if someone has some wisdom on this issue please don’t hesitate to share it.

Glenn (the night rider)

Glenn Simpson

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11 Oct 2013 01:57 #16086 by 928mac
Replied by 928mac on topic Headlight Problem
Its that Magic touch, hmmm or was that black velvet, ... WD40, copper coat, Oh well what ever the reason, glad it works. ;)

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12 Oct 2013 08:37 #16089 by wallyp
Replied by wallyp on topic Headlight Problem
There is a segmented brass disk in the headlight motor/gearbox that provides power to the motor and back to the headlamp relays at the proper times. Sounds as if there was a dirty spot on the disk. Hopefully, the problem won't pop u again - if it does, cleaning that disk might be the next step.

Wally Plumley
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www.928gt.com

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13 Oct 2013 07:02 #16095 by AirtekHVAC
Replied by AirtekHVAC on topic Headlight Problem
Headlight switch maybe failing? Also, mine would not go up...found corrosion in the connector at the motor...easy clean and fix....

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